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Finding the Fourth Proportional to 218,718.64, 328,078.14 and 60,951.28

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Solution

The fourth proportional to 218,718.64, 328,078.14 and 60,951.28 is: 91,426.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,718.64 : 328,078.14 = 60,951.28 : x
  2. Step 2: Convert to fraction form
    218,718.64/328,078.14 = 60,951.28/x
  3. Step 3: Cross multiply
    218,718.64x = 328,078.14 × 60,951.28
  4. Step 4: Simplify right side
    218,718.64x = 19,996,782,573.02
  5. Step 5: Solve for x
    x = 19,996,782,573.02/218,718.64
  6. Step 6: Final answer
    x = 91,426.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.